CVE-2026-103634— Apache DataSketches 越界读写漏洞
一分钟漏洞结论
影响对象
Apache Software Foundation Apache DataSketches
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Apache DataSketches C++（仓库：datasketches-cpp）在 Count-Min Sketch 的反序列化过程中存在越界读取和写入漏洞。 方法在检查输入大小时未包含数据头（preamble），导致截断的 Sketch 数据可能引发从输入末尾向后最多读取 16 字节的越界行为。此外，表格大小是通过 32 位算术运算，根据序列化的桶数量（buckets）和哈希函数数量计算得出的。攻击者可构造恶意 Sketch，使该计算结果发生溢出并回绕为零，导致反序列化后的 Sketch 拥有一个空表格。
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一、 漏洞 CVE-2026-103634 基础信息
漏洞信息
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Vulnerability Title
Apache DataSketches: datasketches-cpp: Out-of-bounds read and write in Count-Min sketch deserialization allows memory corruption via a crafted sketch
来源: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds read and write in the Count-Min sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).
count_min_sketch::deserialize() did not include the preamble in its input size check, so a truncated sketch could cause a read of up to 16 bytes past the end of the input. In addition, the table size was computed from the serialized number of buckets and number of hash functions in 32-bit arithmetic. A crafted sketch could make it wrap to zero, so that the sketch deserialized with an empty table, and later updates and estimate queries read and wrote outside the heap allocation. This can corrupt heap memory, causing a crash and potentially enabling further exploitation.
This issue affects Apache DataSketches C++: from 4.1.0 before 5.3.0. Only applications that deserialize Count-Min sketches from untrusted sources are affected.
Users are recommended to upgrade to version 5.3.0, which fixes this issue.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Apache Software Foundation | Apache DataSketches | 4.1.0 ~ 5.2.0 | - |
|
二、漏洞 CVE-2026-103634 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-103634 厂商页面 (1)
CVE-2026-103634 其他参考 (1)
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https://lists.apache.org/thread/rkx9oh06g5cjc6vmmpqloxwfz0gzz01h vendor-advisory
IV. Related Vulnerabilities
V. Comments for CVE-2026-103634
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